hey found a little info...
Check
this out. It's about a Kawasaki, but it does mention brit bikes and 360's in general. Like this...
Quote:
The pistons rise and fall together (with a 360-degree crank) like some of the British bikes of yore.
OK found some more here and it's about the america!
One thing I forgot to mention before is that there's a bunch of counterbalancers inside to smooth out the vibrations and such caused by the pistions moving up and down...